CPU, or Central Processing Unit, is that component of a computer system or a hosting server that carries out each of the calculations. Every single CPU runs at a specific speed and the larger it is, the quicker everything will be processed, so in case you host resource-demanding web applications on a hosting server, for example, a quick processor will allow them to be performed faster, which will drastically contribute to the entire user experience. The current generations of CPUs have two and more cores, each one running at a specific speed to guarantee a better and quicker performance. This type of architecture allows the processor to handle different processes all at once or several cores to manage a single process if it needs additional computing power to be executed. Needless to say, other elements such as the amount of RAM or the connection that a particular server uses can also affect the performance of the sites hosted on it.